What is the biggest word you can assemble with this list?Try 'parathyroidectomizing', which is made up of 21 letters.
What's the maximum number of words you can make from this list?On this page of words starting with 'p' that contain 'yro', there are 269 combinations that can be selected.
What's an unusual word from all the word combinations available on this list?The most notable word from this page is certainly 'pyrochlore'. 'Pyrochlore''s definition is "A niobate of calcium, cerium, and other bases, occurring usually in octahedrons of a yellowish or brownish color and resinous luster; -- so called from its becoming grass-green on being subjected to heat under the blowpipe.", according to the English dictionary.
What's the best score you could get in Scrabble using this list of words starting with 'p' that contain 'yro'?Since there are a sizeable 269 entries, your best option is 'pyrolyze' which scores 25 points.